The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 1989
Filed:
Apr. 20, 1989
Richard G Johnson, Portland, OR (US);
Warn Industries, Inc., Milwaukie, OR (US);
Abstract
A winch powered by an electric motor. A steel torroid determines the magnetic field generated by the current demand of the motor. A voltage sensitive hall effect switch is provided with a voltage input. The magnetic field detected by the steel torroid is also provided to the hall effect switch. Upon receiving the combined input of magnetic field and voltage, the hall effect switch is activated to shut off the motor. A potentiometer varies the voltage input to the hall effect switch to vary the demand of magnetic field necessary to activate the shut off function.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile